I was working on a cigarette lighter in my RV yesterday trying to make it work, checked the voltage and it sparked. Couldn't get it working so I gave up. Today I went to start the RV and it won't start. It will turn over but won't start. I checked all the fuses, they look OK. Any ideas?
rallison

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Glad you're aboard. I would start by checking the battery voltage and working from there. Charge up the batteries if they are low on charge. CHeck the fuse panels for blown fuses. Best of luck in finding the problem. Enjoy your adventures and be safe.

I very seriously doubt the cigarette lighter circuit and ignition are tied together on a fuse or breaker. But if they are, you have a multimeter if you were testing voltage. When you sparked the lighter was it the red lead shorting between the hot center tap of the lighter socket and the ground surround? I would retest the lighter to see if you have voltage on it (being careful not to short it again if that's what caused the spark). If you've got 12 volts, then obviously no fuse or breaker is popped. If you don't have voltage then I'd first check for an inline fuse on the feed to the lighter. If there is an inline fuse and it is blown, then that's your lighter issue, but not your ignition problem since the only way to start the engine in this type of arrangement would be to have the cigarette lighter fully engaged in the socket 100% of time (impossible). If there is no inline fuse, then most likely there is a fuse panel fuse blown somewhere. There can be multiple locations in an RV. The only other explanation I can think of is you have a wiring harness short somewhere. If you were yanking on wires behind the dash when the spark occurred this might indicate why you can't start it. Otherwise, I'm guessing the two problems are not related.